US4233250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for synthesizing the alkali metal salts of dinetromethane
Assignee: United States Department of the Air Force
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Filing: 1979-04-26
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Granted: 1980-11-11
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Expires: 1999-04-26
Abstract
Abstract A process for synthesizing the alkali metal salts of dinitromethane by effecting the saponification of methyl cyanodinitroacetate previously prepared by the nitration of methyl cyanooximinoacetate.
Inventors
- 👤 Vytautos Grakauskas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:36
CPC Classifications
C; C07; C07F; C07F1/00; C07C; C07C201/00; C07C201/06; C07C201/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
94 words
A process for preparing the alkali metal salts of dinitromethane which comprises the steps of (A) effecting the nitration of methyl cyanooximinoacetate to produce methyl cyanodinitroacetate; (B) effecting the hydrolysis of the resulting cyanodinitroacetate to produce dinitroacetonitrile; (C) effecting the neutralization of said dinitroacetonitrile with an alkali metal hydroxide to produce the corresponding alkali metal salt of cyanodinitromethide; and (D) effecting the saponification of said cyanodinitromethide salt with an aqueous solution of an alkali metal hydroxide at a temperature and for a time period sufficient to produce the corresponding alkali metal salt of dinitromethane.
Claim 2
Dependent Claim
94 words
A process for preparing the alkali metal salts of dinitromethane which comprises the steps of (A) effecting the nitration of methyl cyanooximinoacetate to produce methyl cyanodinitroacetate; (B) effecting the hydrolysis of the resulting cyanodinitroacetate to produce dinitroacetonitrile; (C) effecting the neutralization of said dinitroacetonitrile with an alkali metal hydroxide to produce the corresponding alkali metal salt of cyanodinitromethide; and (D) effecting the saponification of said cyanodinitromethide salt with an aqueous solution of an alkali metal hydroxide at a temperature and for a time period sufficient to produce the corresponding alkali metal salt of dinitromethane.
Claim 3
Dependent Claim
23 words
A process in accordance with claim 1 wherein said methyl cyanooximinoacetate is produced by the nitrosation of methyl cyanoacetate with sodium nitrile-phosphoric acid.
Claim 4
Dependent Claim
32 words
A process in accordance with claim 1 wherein said saponification takes places within a temperature environment of from about 90° to 95° C. for a period of about 2.0 to 2.5 hours.
Claim 5
Dependent Claim
25 words
A process in accordance with claim 3 wherein said aqueous alkali metal hydroxide is selected from the group consisting of sodium hydroxide and potassium hydroxide.
References Cited (Backward Citations)
US2597027A
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US3067261A
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US2161475A
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US3387044A
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US3378596A
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US3706808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |